| 摘要 |
A screen extending frame in which a screen attached thereto is not distorted even when a screen extending jig is removed therefrom for storage or transportation is provided. Cut grooves are formed from the inner side to the outer side of, or from the outer side to the inner side of the direction, or in both directions of couplings of the screen extending frame constituted by connecting four frame members in a rectangle shape by means of welding, or the like, and the cut grooves enable the couplings to deform. The four frame members constituting the screen extending frame, which are individual bodies, join by corner members, and connecting portions are inclined with respect to the longitudinal direction of the frame members, thereby gaps are created in the connections. Alternatively, elastic elements are placed at the connections of the four frame members constituting the screen extending frame. Alternatively, the connecting portions are orthogonal to the longitudinal direction, and elastic elements are placed at the connections. |
